/Engine/Plugins/Runtime/NetworkPrediction/Source/NetworkPrediction/Public/NetworkPredictionDriver.h
If you really need to return the string's produced here, use anFStringOutputDevice. Otherwise they will be stacked allocated
static void LogUserStates ( const [TNetworkPredictionState](API\Plugins\NetworkPrediction\TNetworkPredictionState)< [StateTypes](API\Plugins\NetworkPrediction\FNetworkPredictionDriverBase\StateTypes) > & UserStates, [FOutputDevice](API\Runtime\Core\Misc\FOutputDevice) & Ar )